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FUNCTIONAL TESTS

FUNCTIONAL CHECKS
(AFTER EACH USE AND MONTHLY)

1.  Check that the regulator works properly. The regulator

outlet should be sanitized before and after testing.

a. Check that the cylinder valve and buttons are

closed and that the system is not pressurized.

b. Gently inhale through the regulator outlet and hold

your breath for about 10 seconds. If the negative
pressure is maintained, there is no leakage.

c. Gently exhale through the regulator outlet for about

10 seconds. If the positive pressure is maintained,
there is no leakage.

d. Do not use the apparatus if airflow through the reg-

ulator is detected in either test. Return the regulator
to a certified repairperson.

2.  Inspect the buttons and bypass valve. 

a. With the regulator pressurized, operate each valve

to be sure it operates. Venting of pressure relief
valves (or a continuing flow of air through the regu-
lator when the user is not inhaling) indicates that the
regulator needs to be repaired.

b. Listen to the regulator. Any unusual sounds such as

whistling, chattering, clicking, or rattling mean that
the regulator should be checked further.

c. If any of these symptoms occur, the apparatus must

be removed from service. Return the regulator to a
certified repairperson.

3.  Whistle Audible Alarm

a. Check that the function of the whistle audible warn-

ing device be checked by observing the regulator
gauge pressure at which the alarms sounds.
Perform this test with a minimum cylinder pressure
of 1,200 psig for the Low Pressure Air Mask, and
2,000 psig for the High Pressure Air Mask.

b. Pressurize the system by opening the cylinder valve

for a moment, then close it. The whistle must sound
indicating it is functioning.

c. Open bypass slowly.
d. Watch the drop in pressure on the shoulder gauge

and the point at which the whistle must begin to
sound. Nominal gauge readings at which the whistle
starts to sound are listed below.

550 psig approximately (low pressure system)
1125 psig approximately (high pressure system)

e. The whistle must continue until the air pressure is

approximately 200 psig or less. If the whistle does
not function properly, the apparatus must be
removed from service.

Do not disconnect the regulator coupling nut when
pressure is shown on the regulator gauge. Release all
pressure from the regulator by opening the bypass
valve. Removing the coupling nut with the regulator
pressurized may result in serious personal injury,
death, or damage to equipment.

f. Open the bypass valve slowly to release trapped air.

Close bypass valve.

g. Unscrew the regulator coupling nut from the cylin-

der valve. It is hand-tight and should not require
tools.

h. Inspect the coupling nut for thread damage. Also be

sure there is an O-ring and that it is not damaged.

i. Replace the O-ring if it is damaged.

19

TAL 5010 (L) Rev. 3 - 10037469 

WARNING

Summary of Contents for AirHawk MMR

Page 1: ...ONS inside For any additional information relative to use or repair write or call 1 800 MSA 2222 during regular working hours See separate insert for NIOSH approval information P N 10039170 For air li...

Page 2: ...e furnished by the manufacturer under the pertinent approval shall be maintained NIOSH Approval Information is included as a supplement to these instructions P N 10039170 IMPORTANT NOTICE FOR RESPIRAT...

Page 3: ...safe non haz ardous non toxic atmosphere 5 Return to a safe atmosphere immediately if discol oration crazing blistering cracking or other dete rioration of the lens material is observed 6 Users must w...

Page 4: ...NOTES 4 TAL 5010 L Rev 3 10037469...

Page 5: ...nimize the possibility of a first stage failure The regulator uses a large sintered filter which is easy to replace The filter captures particulates that may be in the air stream SECOND STAGE REGULATO...

Page 6: ...n evenly distributes cylinder weight across the wearer s hips FACEPIECE The facepiece is available in three sizes Only Ultra Elite Hycar facepieces model numbers 7 935 7 7 935 8 and 7 935 9 have been...

Page 7: ...AND WHISTLE AUDIBLE ALARM CHECKS TESTING 1 Grasp the mask mounted regulator and push the top release button 2 Check that the red bypass knob is fully closed clockwise 3 Reach behind and open the cyli...

Page 8: ...straps first by pulling them straight back not out Tighten the temple straps the same way Tuck in the ends of the straps so that they lay flat across the head 4 Push headband pad towards neck retighte...

Page 9: ...ore using the apparatus INSTALLING SLIDE MASK MOUNTED REGULATOR 1 Grasp regulator and orient regulator so that red bypass knob is pointing to the right and slide button is on top 2 Slide regulator ont...

Page 10: ...return to fresh air The whistle activates when cylinder pressure drops below approximate values 550 psig approximately for low pressure 1125 psig approximately for high pressure when the whistle acti...

Page 11: ...and pull regulator down and out of facepiece adapter Note Regulator can hang on cover rail in a stand by mode 3 Slide regulator up rail until regulator slide button is free of cover rail 4 Close the c...

Page 12: ...burst disc and gasket are installed prior to cylinder recharging Establish the service pressure of the cylinder Type 3AA steel cylin ders that bear a plus sign after the latest retest date may be rech...

Page 13: ...Ice can build up and freeze the buttons bypass valve and the release tabs Before entering or re entering a hazardous atmos phere make sure the buttons release tabs and bypass valve are ice free and op...

Page 14: ...NOTES 14 TAL 5010 L Rev 3 10037469...

Page 15: ...e c Rinse the facepiece and components in clean warm 110 F water preferably running and drained d Clean the pressure demand exhalation valve by pressing in on the stem with a blunt object and flushing...

Page 16: ...NOTES 16 TAL 5010 L Rev 3 10037469...

Page 17: ...hat the required inspections and tests be performed on all SCBA cylinders in accordance with Department of Transportation DOT regulations DOT reg ulations require that composite cylinders be retired f...

Page 18: ...NOTES 18 TAL 5010 L Rev 3 10037469...

Page 19: ...e audible warn ing device be checked by observing the regulator gauge pressure at which the alarms sounds Perform this test with a minimum cylinder pressure of 1 200 psig for the Low Pressure Air Mask...

Page 20: ...ly and Repair sections and includes installation of the Regulator overhaul kits MSA breathing apparatus must be flow tested every year using an MSA approved flow test device The following table summar...

Page 21: ...NOTES 21 TAL 5010 L Rev 3 10037469...

Page 22: ...NOTES 22 TAL 5010 L Rev 3 10037469...

Page 23: ...parts that after by MSA are proven to be d f defective and or will provided at no cost t F Purchaser s of re to repair not cause the remedy established hereby to fail of its essential purpose MSA r e...

Page 24: ......

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